Diffusion cover art

Mod

Diffusion

2025 · PC (Microsoft Windows) · Shooter

About this game

Diffusion is a total-conversion mod in its own universe, based on Half-Life SDK and running on Xash3D FWGS engine.

You, James Smith (served in SWAT for a decade with no failed ops), on vacation and driving your car to some nice place, to take a break from your usual work routines. Driving on a deserted road somewhere in Utah, the car breaks down. With miles of nothing behind, J. decides to go forward and stumbles upon an abandoned rock/sand processing factory with just one yawning guard sitting there. Pointed by the guard, J. walks behind the factory to find the phone. When he comes back, he only sees two army trucks and the dead guard… J.'s curiosity leads him inside the factory only to find that this place is absolutely not what it seems to be…

Screenshots

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Trailers & videos

Gameplay Trailer

Gameplay Video

Gameplay Video

Game facts

Release date

Nov 22, 2025

Platforms

PC (Microsoft Windows)

Genres

Shooter

Themes

Action, Science fiction

Game modes

Single player

Perspective

First person

Editions & related releases

More games to explore

Game data and artwork via IGDB.

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